Sewing machine



FIG. 1 is a front perspective view of a sewing machine showing my design;

FIG. 2 is a front perspective view of FIG. 1 shown with the cover removed;

FIG. 3 is a front elevational of the sewing machine;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a sewing machine, as shown and described. 